I tumble again in untreated corn cob. I keep one bucket of untreated corn cob specifically for this.

I type this, as I just finished tumbling 1800 223 LC 1x fired (crimped primers) brass. So, after I size and deprime, swage primer crimp, will trim to length, inside/outside case mouth bevel, and perform the same magic on the primer hole.....then.....tumble in clean corn cob.

I size my cases then put them in my vibe-tumbler with Lyman treated corn cob. I have to inspect and clean out the primer pockets and flash hole but that is no big problem I use one of the small screw drivers used for glasses to clean out the pockets and holes.

I switched from case lube to Hornady One-Shot lube. It seems to lube better -full length resizer die doesn't take as much pressure. It cleans off easily with a paper towel. Doesn't leave a residue like the case lube and is easier to clean off.